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Simulation Of A Cooperative Protocol For Common Control Channel Implementation

Simulation Of A Cooperative Protocol For Common Control Channel Implementation. Prepared by: Aishah Thaher Shymaa Khalaf Supervisor: Dr.Ahmed Al- Masri. Out Line. What is “TV White Space ” ? Spectrum Sensing Methods Cognitive channel models Network Setup Problem

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Simulation Of A Cooperative Protocol For Common Control Channel Implementation

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  1. Simulation Of A Cooperative Protocol For Common Control Channel Implementation Prepared by: AishahThaher ShymaaKhalaf Supervisor: Dr.Ahmed Al-Masri

  2. Out Line • What is “TV White Space”? • Spectrum Sensing Methods • Cognitive channel models • Network Setup Problem • Algorithm for the cooperative protocol • Simulation Results • Conclusion

  3. What is “TV White Space”?

  4. Benefits Of TV White Space Usage higher bandwidth widely available network access

  5. Spectrum Sensing Methods

  6. 1.Matched Filtering

  7. 2. Energy Detection • Optimal way to detect primary signals when • information of the primary signal is unknown • to secondary users • Measures the energy of the received waveform over a specified observation time • Can be implemented both in time • and also frequency domain

  8. 3. CyclostationaryFeature Detection • having a drawback of high computationally complexity • performs satisfyingly well under low SNR regimes due to its robustness against unknown level of noise • it is not susceptible to noise levels as energy detection

  9. 4. Higher Order Statistics • Motivated for the need of more efficient and flexible • communication system • very useful in problems where non-gaussian, • colored noise have to be considered • applicable in non-Gaussian or non-linear processes

  10. 5. Waveform Based Sensing • only applicable to systems with known signal patterns • the performance of the sensing algorithms increases as the length of the known signal pattern increases

  11. Cognitive channel models

  12. 1. Underlay paradigm

  13. 2. Overlay paradigm

  14. 3. Interweave paradigm • the cognitive users are required to not interfere with the primary users • requires the cognitive users to collect side information about the primary users' activity

  15. Network Setup Problem

  16. Common Control Channel Problem

  17. Algorithm for the cooperative protocol

  18. sensing flowchart

  19. Simulation Results

  20. average Time with varied number of channels sequential protocol cooperative protocol

  21. comparison between sequential and cooperative protocols

  22. Average time which is needed to have information about 30% , 50% and 100% of the system information

  23. Response of the cooperative system for different number of users

  24. Conclusion The Network Setup Problem (NSP) is discussed and our protocol is proposed to set up a Multi-hop CRN (MHCRN), it was observed that our cooperative protocol can Exploits the resources at the best and fastest ways and allowing the users the opportunity to meet and communicate as soon as possible compared to the SEQ-protocol that proposed in " Cognitive Radio Network Setup without a Common Control Channel " paper.

  25. Thank you…

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